SU1650605A1 - Industrial wastewater treatment plant - Google Patents

Abstract

The invention relates to the treatment of wastewater, mainly rolling production, and is intended to extract from them scale and technical oil for disposal, as well as to return part of the clarified water to the circulating water supply system. Wastewater flows through tray 1 to the receiving chamber 2, the scale falls to the bottom and is discharged through pipe 6 to the bunker 8 to dehydrate it. Oil-containing drains pass through partitions 3, enter compartments 4, from where through filter 18 enter pipe 19 When moving, the oil is collected in the chute 20, from where it is discharged through the pipe 21 to the hopper 23 to drain it. Purified from scale and oil, the water pump 26 returns to the production of 4 h. apt. 5 il.

Description

The invention relates to the treatment of industrial wastewater, mainly rolling production, and is intended to extract scale and technical oil from them for disposal, as well as to return part of the clarified water to the circulating water supply system.

The aim of the invention is to intensify the process of sewage purification from scale and oil.

FIG. 1 shows the proposed installation, plan view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a section of YYD in FIG. one.

The installation contains a tray 1 through which the waste water is transported after cooling the rolled stock, descaling and hydro-scale transport with admixture of technical oil into the receiving chamber 2, divided by vertical, not reaching to the bottom, partitions 3 into three compartments: the central section 4 for collecting scale and two side compartments 5 for collecting oil-containing water, the upper ends of the partitions 3 are located at the bottom of the supply tray 1, and the lower ones do not reach the bottom of the receiving chamber 2, the nozzle 6, the living section of which provides the estimated flow rate accurate liquid with high concentration of scale, valve 7 on this nozzle, and in connection with the presence in the waste liquid of a large amount of scale, the valve is installed of a slide type, removable hopper 8 for dewatering of scale, monorail 9 with carriage 10, pipe with valve 11, through which the filtrate is removed from the bunker 8 during its filling, the pad 12 where the final descaling of the scale takes place before transporting it to the disposal site, the funnel 13. receiving water from the bunker at the final return AANII dross conduit 14 conveying water from the funnel by (A

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a separate tank, a tank 15 into which water from the dewatess bins of the cave is sent, a pump 16 pumping liquid from the tank through the discharge pipeline 17 on radial or horizontal septic tanks, filters 18. placed on the ends of the pipelines 19 to drain oily water with the possibility of replacement them for regeneration, made with a rectangular cross-section and a double-sloped upper wall, with an oil gutter 20 located at the top of which, branch pipes 21 with valves 22 for draining oil from the oil gutters 20 to a removable bin 23 for dewatering oil, equipped with an automatic device for discharging water accumulating under the oil, wedding to the carriage 10 moving along the monorail 9, semi-submersible partitions / 4 placed at the outlet of the pipelines 19, nozzles 25 for discharging the clarified water lines from the pipelines 19, pump 26 sec pressure pipe 27 for supplying clarified water to the system of water jet and hydro-transport of mill scale.

The installation works as follows.

The wastewater formed after cooling of the rolled strip, hydroscopic and hydrotransport of scale with an admixture of technical oil through tray 1 enters compartment 4 of the receiving chamber 2, in which the release of scale occurs, oily drains pass under partitions 3 and enter the compartment 5, scale is through the port 6 with the valve 7 is guided to the hopper 8 for descaling the scale. Oily drains, penetrate through the filters 18, the passage in the pipeline 19.

By means of a slide-type valve 7, a predetermined consumption of a scaling stream is controlled, in which the maximum concentrated scale content is maintained.

In the bunker 8, equipped with filters, the scale accumulates and water flows through the open valve 11 into the tank 15. After filling the bunker with the scale, the valve 11 is closed and the bunker using the trolley 10 moving along the monorail 9 moves along the platform 12 for final dewatering of the scale before transporting it to the zglofabrika for disposal At the same time, immediately after the removal of the silo-filled bunker,

Residual water from the bunker 8 installed on the site 12. through the valve 11

passes into the fire pit 13, from which the pipeline 14 is discharged into the tank 15

Pass through the filters 18, the oily waste water slowly flow

through pipelines 19 to the outlet from them through pipes 25 to the pump 26, by means of which, through the pressure pipeline 27, clarified bars are fed to the circulating water supply system of the rolling mill

0 for descaling and descaling. During the slow flow of oil-containing waste water through pipelines 19, laid with a slope towards the filters, the oil contained in the liquid,

5 floats on its surface and is discharged through the oil gutter 20 to the outlet via nozzles 21 and gate valves 22, which regulate a given oil flow rate, into an oil dewatering hopper 23 equipped with an automatic device for removing water accumulated under the oil.

The liquid accumulating in the tank 15 by means of a pump 16 on the pressure head.

5, the pipeline 17 is pumped for cleaning into radial or horizontal sumps.

The proposed installation allows you to extract 99% of the scale from its total amount.

0 in wastewater, the same dross with a fraction of 150-5 µm in an amount of not more than 1% is discharged with part of the wastewater to secondary sedimentation tanks. In this process, the dross is recovered unoiled

5 utilization, since the separation of wastewater entering the plant into scaling and oil-containing flows occurs within 1-2 minutes after their formation.

Claims (5)

0 The extracted technical oil contains a minimum amount of water and fine scale, which simplifies its regeneration. Claims 1. Wastewater treatment plant 5, mainly rolling production, containing a receiving chamber divided by vertical, not reaching to the bottom, partitions for collecting dross and oily water, a device for transporting dross, a pipeline with a filter for draining oil containing water, a catchment tank with a pipeline for withdrawing purified water, characterized in that 5, the purpose of intensifying the cleaning process is that the receiving chamber is equipped with a pipe with a valve installed at the bottom of the collection chamber and a removable tank for descaling the scale, and a pipeline for discharging oil-containing water with a pipe with a valve for removal of oil and a removable oil drainage bin, installed with a bias towards the catchment tank and made rectangular with a gable upper wall having an oil drain chute at the top. 2. Installation under item 1, characterized in that the receiving chamber is provided with an additional compartment for collecting oil-containing water. additional pipeline for removal of oil-containing water with a pipe and valve. 3. Installing pop. 1, characterized in that the pipeline for discharging oil-containing water is provided with a semi-submersible partition installed at the outlet, 4. Installation according to paragraph. Distinguishing - so. that the oil dewatering hopper is provided with nozzles for draining oil and water. 5. Installing pop. 1, characterized in that the tank for descaling is equipped with a valve with a valve installed at the bottom. ten . AT Fig 7 7777777 /////// FIG. I l about vЈ7 About Yu CD h N "4J BUT & CQ i E